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IsZero
Syntax
IsZero(X:OBJECT):BOOL
Summary
test whether an object is zero
Description
This function tests whether its argument is zero; the argument can be
of almost any type for which
zero makes sense.
example
IsZero(23);
FALSE
-------------------------------
IsZero(3-3);
TRUE
-------------------------------
Use R ::= Q[x,y];
IsZero(x^2+3y-1);
FALSE
-------------------------------
IsZero(Ideal(x^2,xy^3));
FALSE
-------------------------------
IsZero(Vector(0,0,0));
TRUE
-------------------------------
See Also